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Finding the Fourth Proportional to 74,264.79, 111,403.74 and 20,957.24

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Solution

The fourth proportional to 74,264.79, 111,403.74 and 20,957.24 is: 31,437.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,264.79 : 111,403.74 = 20,957.24 : x
  2. Step 2: Convert to fraction form
    74,264.79/111,403.74 = 20,957.24/x
  3. Step 3: Cross multiply
    74,264.79x = 111,403.74 × 20,957.24
  4. Step 4: Simplify right side
    74,264.79x = 2,334,714,359.06
  5. Step 5: Solve for x
    x = 2,334,714,359.06/74,264.79
  6. Step 6: Final answer
    x = 31,437.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.